How to log mysql queries of specific database - Linux

I have been looking at this post How can I log "show processlist" when there are more than n queries?

it is working fine by running this command

mysql -uroot -e "show full processlist" | tee plist-$date.log | wc -l

the problem it is overriding the file

i also want to run it in cronjob. i have added this command to the /var/spool/cron/root

* * * * * [ $(mysql -uroot -e "show full processlist" | tee plist-`date +%F-%H-%M`.log | wc -l) -lt 51 ] && rm plist-`date +%F-%H-%M`.log

but it is not working. or maybe it is saving the log file some place out of the root folder.

so my question is: How to temporary log all queries from specific database and specific table and save the whole queries in 1 file?

note. it is not slow/long quries log iam looking for, but just temp solution to read which queries are running for a database